Duke of Arión (Spanish: Duque de Arión) is an hereditary title in the Peerage of Spain accompanied by the dignity of Grandee, granted in 1725 by Philip V to Baltasar de Zúñiga, viceroy of New Spain.

[2][3][4] The title makes reference to the town of Casasola de Arión, in the Province of Valladolid.